Alumina Trihydrate (ATH)AVersatilePigmentforCoatings,Inks,Adhesives,CaulksandSealantsApplications

Huber’s Alumina Trihydrate (ATH)Alumina trihydrate (ATH) is often associated with its role as a non-halogen flame retardant and smoke suppressant, and for good reason, as ATH is the largest selling fire retardant additive in the world. Synonyms for ATH you might be familiar with include: 4Hydrated Alumina 4Aluminum Hydroxide 4Aluminum TrihydroxideATH is an extremely functional and versatile pigment and useful in a number of coatings, inks, adhesives, caulks and sealants applications. Because ATH is an inert functional pigment available in a wide array of particle size distributions, it offers a number of key features and benefits:

Features BenefitsDehydration at 428°F Flame retardance(220°C) Smoke suppression

High brightness Extends titanium dioxide (TiO2) and colors without darkening

Median particle size: Reduces or maintains gloss, depending on the particle size 1 micron to 80 microns Good anti-settling characteristics Hegman grind values as high as 7 Low oil absorption Viscosity stability with high pigment loadings

Reflactive index of 1.57 Imparts little tint strength, which means transparency or translucency in some resin systems, especially UV cured systems

Non-abrasive Disperses effortlessly Easy on equipment

Chemically inert Exterior durability Stain, scrub and water resistant UV transparent

Metallic hydroxide Thermal conductivitychemistry Disperses effortlessly Composition Source of aluminum in the production of color pigments Low impurities mean faster cure in thick UV cured systems Non-toxic Non-halogen

Compatible with cationic Complete flexibility in choosing polymers or anionic systems

Flame Retardant MechanismATH decomposes in an environmentally-friendly mechanism known as dehydration. This endothermic reaction results in the formation of two non-toxic ingredients – aluminum oxide, which forms an inert residue, and water which dilutes the smoke (see illustration at right).

Double Precipitated ATH•Narrowerparticlesizedistribution/ relatively low surface area•Higherpurity•Veryhighwhiteness,brightness

Ground ATH •Relativelybroadparticle size distribution•Economical

The Physical Properties of ATH Physical Form Powder

Particle Morphology Hexagonal Platelet

Brightness (Standard Grades) 90 – 92

Brightness (Double Precipitated) 100

Specific Gravity, g/cm3 2.42

pH Value 9 – 10

Mohs Hardness 2.5 – 3.5

Refractive Index 1.57

Decomposition Temperature 428°F/220°C

Heat of Decomposition, cal/g 280

Theoretical Loss on Ignition, % 34.6%

Extending with Stain Resistance/Scrub ResistanceHuber’sATHisinert,lowinoilabsorptionandcompletelyinsolubleinwater,alcoholandothersolvents.Incastpolymerandsolidsurfaceapplications,ATH istheidealchoicetoprovidestainresistanceforkitchencountertops.Insome coating systems, ATH outperforms calcium carbonate, hydrous clays and other fillers which are more water sensitive.

Huber produces grades of ATH with a hydrophobic surface treatment to impart outstandingwaterresistance.The“SG”treatmentisavailableonanyparticlesizeATH.

Two ATH ProcessesThere are two processes used to produce ATH in coatings, inks, adhesives, caulks and sealants applications which yield different particle size distributions and purity.

TominimizetheuseofTiO2ororganiccolorants,Huber’shighbrightnessgrades ofATHrangingfrom1micronto80micronsaremuchhigherinbrightness(lowerbvalues)thancommonlyusedextenders.Masstonecolorscanbeextendedusing high brightness precipitated ATH with more clarity than most other fillers.

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These typical properties cannot be considered as specifications.*Huber’s HN products are produced in the Netherlands. **Oil absorption of the base ATH product.***Double precipitated grades.

Huber’s Key ATH Product Offerings for Coatings, Inks, Adhesives, Caulks and Sealants

High Brightness Grades

Onyx Elite® 431

SpaceRite® S-3***

Standard Grades

SB 36

SB 336

SB 332

SB 432

Micral® 532

Micral® AM550

Micral® 632

Micral® 932

Micral® 1500

Treated Grades

Hymod® SB432 SG

Hymod® M632 SG

Hymod® M932 SG

Hymod® M9400 SG***

Netherlands Grades*

HN 100

HN 36

HN 336

HN 434

HN 532

White

White

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

Off-white

White

White

White

White

White

4

7

0

2

3

4

5

6

6

6

6+

4

6

6

7

0

1

2

3

5

28

31

20

23

29

28

28

32

32

38

34

28**

32**

38**

31**

18

20

21

22

28

2

4.2

1

1.2

1.5

2

6.4

3.5

7.5

13

10

2

7.5

13

5

0.2

1.4

1.7

3.4

5

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High reflectivity; Thick film systems

Outstanding brightness; TiO2 and color extension

Thermal conductivity

Thermal conductivity

Flame retardance; Flatting

Flame retardance; Flatting

Flatting; Stain resistance; Scrub resistance

Flatting; Stain resistance; Scrub resistance

Flatting; Stain resistance; Scrub resistance

Flatting; Stain resistance; Scrub resistance

TiO2 extension

Hydrophobic; High loadings; Non-aqueous systems

Hydrophobic; High loadings; Non-aqueous systems

Hydrophobic; High loadings; Non-aqueous systems

Hydrophobic; High loadings; Non-aqueous systems

Thermal conductivity

Thermal conductivity

Flatting; Stain resistance; Scrub resistance

Flatting; Stain resistance; Scrub resistance

Flatting; Stain resistance; Scrub resistance

Caulks/SealantsBrightness

8

1.1

19

15

11

9

5

5

3.5

2

1.5

9

3.5

2

1

75

19

14

10

5

MedianParticle

SizeHegmanGrind

OilAbsorption

SurfaceArea Attributes

ArchitecturalCoatings

IndustrialCoatings -

OEM

IndustrialCoatings -

MaintenancePaper

Coatings

Flame RetardantElastomeric

Roof Coatings

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•••

••

PowderCoatings

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•••••

••

Pigments/ Dispersions/Colorants

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•

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InksEnergyCure

GelCoats

EpoxyPotting

Compounds AdhesivesTextile

CoatingsATH Product

Typical Properties and Application Compatibility Grid Note: All ATH products are flame retardants and smoke suppressants.

The Versatility of ATH Results in Application Flexibility and OptionsATH has the physical properties and performance capabilities to be used in many coatings, inks, adhesives, caulks and sealants applications. They include:

Premium semi-gloss and high gloss architectural coatings •EfficientTiO2 spacing/ replacement •PrecipitatedATHishigher brightnessthanTiO2 •Extendswithoutdarkening like mineral extenders •Impartsexcellentbalanceof: - Contrast ratio - Tint strength

Fire retardant coatings, adhesives and construction materials •Releaseswatermoleculesat 428˚F (220˚C) •Thereactionisendothermic,taking heat away from the flame •Theresultingaluminumoxide (Al2O3) forms a char

Elastomeric roof and wall coatings •Flameretardant •Highbrightness •Notwatersoluble •Lowoilabsorption •Easilyreplacescalciumcarbonate •Maintainsmechanicalproperties

Corrosion resistant coatings •Notwatersoluble •Lowerdensitythanbariumsulfate •Hydrophobic-treatedATH grades available •Widevarietyofgradesavailable to optimize particle packing

Powder coatings •Enhancestransferofthepaint

Colored coatings and inks •Offersextremehighbrightness and purity •MinimaleffectonL,a,bcolor space values •Minimaleffectonglosscompared with mineral extenders •Lackofmilkinessinmasstonecolors compared with other extenders Polyurethane sealants •Notwatersensitive •Lowerdensitythanbariumsulfate •Gradesareavailablewithnarrow particle size distributions

Epoxy encapsulating compounds •Excellentthermalconductor, taking heat away from the exothermic epoxy curing mechanism •Arctrackresistance •Lessexpensivethantabularalumina

ATH/Coatings/NA/Rev1/Feb2013

THEREARENOIMPLIEDWARRANTIESOFMERCHANTABILITYORFITNESSFORAPARTICULARPURPOSE.Refer to Huber’s Standard Conditions of Sale for the only express warranties applicable to the Huberproducts.ProductsincorporatingHuberproductsarenotwarrantedbyHuber.InnoeventisHuberliableforconsequential damages. Hymod®,Micral®,OnyxElite®andSpaceRite® are used, applied for, or registered astrademarksoftheJ.M.HuberCorporationforaluminatrihydrateinvariouscountriesaroundtheworld.©2013J.M.HuberCorporation

HuberEngineeredMaterialshasbeensupplyingATHformorethanaquartercentury.Inadditionto an innovative product portfolio for use in a myriad of applications, Huber offers superior technicalsupportandunparalleledcustomerservice.Huber’sunsurpassedtechnicalexpertiseis its foundation in developing innovative ATH products that meet the exacting requirements for each application. Huber has a deep dedication toward customer care and strives to provide fast, personalized service to ensure a rewarding experience for its customers, time after time.

Let us go to work for you. For more information on our high-performing ATH products or to order a sample, contact us:

Call:866-JMHUBER(866-564-8237) Click: hubermaterials.com/versatility Email: hubermaterials@huber.com

Premium semi-gloss and high gloss architectural coatings •EfficientTiO2 spacing/ replacement •PrecipitatedATHishigher brightnessthanTiO2 •Extendswithoutdarkening like mineral extenders •Impartsexcellentbalanceof: - Contrast ratio - Tint strength

Fire retardant coatings, adhesives and construction materials •Releaseswatermoleculesat 428˚F (220˚C) •Thereactionisendothermic,taking heat away from the flame •Theresultingaluminumoxide (Al2O3) forms a char

Elastomeric roof and wall coatings •Flameretardant •Highbrightness •Notwatersoluble •Lowoilabsorption •Easilyreplacescalciumcarbonate •Maintainsmechanicalproperties

Corrosion resistant coatings •Notwatersoluble •Lowerdensitythanbariumsulfate •Hydrophobic-treatedATH grades available •Widevarietyofgradesavailable to optimize particle packing

Powder coatings •Enhancestransferofthepaint

Colored coatings and inks •Offersextremehighbrightness and purity •MinimaleffectonL,a,bcolor space values •Minimaleffectonglosscompared with mineral extenders •Lackofmilkinessinmasstonecolors compared with other extenders Polyurethane sealants •Notwatersensitive •Lowerdensitythanbariumsulfate •Gradesareavailablewithnarrow particle size distributions

Epoxy encapsulating compounds •Excellentthermalconductor, taking heat away from the exothermic epoxy curing mechanism •Arctrackresistance •Lessexpensivethantabularalumina